WO2019157770A1 - Radôme souple à large bande pour antenne à micro-ondes - Google Patents

Radôme souple à large bande pour antenne à micro-ondes Download PDF

Info

Publication number
WO2019157770A1
WO2019157770A1 PCT/CN2018/081240 CN2018081240W WO2019157770A1 WO 2019157770 A1 WO2019157770 A1 WO 2019157770A1 CN 2018081240 W CN2018081240 W CN 2018081240W WO 2019157770 A1 WO2019157770 A1 WO 2019157770A1
Authority
WO
WIPO (PCT)
Prior art keywords
radome
enclosure
antenna
microwave antenna
wide
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2018/081240
Other languages
English (en)
Chinese (zh)
Inventor
刘彬彬
陈鹏羽
李骁男
熊国辉
许超磊
林泽银
郭浩楠
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tongyu Communication Inc
Original Assignee
Tongyu Communication Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tongyu Communication Inc filed Critical Tongyu Communication Inc
Priority to EP18906409.0A priority Critical patent/EP3754785B1/fr
Publication of WO2019157770A1 publication Critical patent/WO2019157770A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/42—Housings not intimately mechanically associated with radiating elements, e.g. radome
    • H01Q1/427—Flexible radomes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
    • H01Q19/10—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces
    • H01Q19/18—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces having two or more spaced reflecting surfaces
    • H01Q19/19—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces having two or more spaced reflecting surfaces comprising one main concave reflecting surface associated with an auxiliary reflecting surface
    • H01Q19/193—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces having two or more spaced reflecting surfaces comprising one main concave reflecting surface associated with an auxiliary reflecting surface with feed supported subreflector

Definitions

  • the invention relates to a radome for a microwave antenna, in particular to a flexible radome for a microwave antenna adapted to a wide frequency band requirement.
  • the microwave antenna is an indispensable part of the system.
  • the antenna performance needs to be higher and higher, and the user experience and production of the microwave antenna The versatility has raised higher requirements.
  • the radome is installed outside the antenna and is a structure for protecting the microwave antenna system from the external environment.
  • the purpose of the radome is as follows:
  • the radome to establish a closed area to protect the microwave antenna system from external natural factors such as wind, rain, ice, dust and solar radiation, so as to maintain the electrical performance of the microwave antenna is stable and reliable.
  • the microwave antenna system is relieved of wear, corrosion and aging caused by natural environmental factors such as wind blowing and sunshine, so as to prolong the service life of the microwave antenna.
  • the influence of the radome on the shape of the outer contour of the antenna can improve the wind load characteristics of the microwave antenna system to reduce the risk of damage to the antenna system caused by the wind load, while maintaining the necessary mechanical strength and reducing the impact of conventional installation and accidental impact. Destroy the risk.
  • the radome of the microwave antenna is generally disposed at the distal end (open end) of the paraboloid of the antenna, and the periphery of the radome is fixed on the enclosure around the antenna.
  • the radome will inevitably absorb and reflect the microwave radiation of the antenna, which affects the electrical performance of the antenna to some extent. Therefore, in order to obtain a high-performance antenna, the radome is required to have good electromagnetic wave penetration characteristics in electrical performance, a small antenna insertion loss, sufficient strength and durability in mechanical properties, and can withstand external external harsh environments.
  • the radome is usually made of a material having a low dielectric constant and a low loss tangent and high mechanical strength, such as glass reinforced plastic, foam, epoxy resin, high molecular polymer, and the like.
  • the radome generally employs a uniform single wall structure having a concave/convex surface, a sandwich structure, a space skeleton structure, and the like.
  • the thermoforming method is usually used to make the radome have different shapes.
  • the conventional radome of the existing microwave antenna product usually adopts a rigid material such as special engineering plastic (ABS) to form a concave or convex taper angle structure by hot press forming to obtain wider radiation characteristics.
  • a rigid material such as special engineering plastic (ABS)
  • ABS special engineering plastic
  • the rigid radome such as special engineering plastic (ABS) has high mechanical strength, but the weight and volume are generally large, and the wave transmission performance is not ideal.
  • the radome In order to minimize the reflection of the radome, increase the gain, and reduce the insertion loss value, it is usually necessary to design the uniform thickness of the single-wall wall thickness or the sandwich structure of the radome according to the working wavelength, and generally adopt the thickness corresponding to the half-wavelength medium.
  • the radome achieves better wave transmission performance.
  • the microwave antenna covers multiple frequency bands.
  • the thickness specification of the radome according to the wavelength design cannot be adapted to multiple frequency bands. If the thickness of the radome is designed according to the working wavelength, the microwave antennas of different frequency bands are required to adopt different thickness specifications. Radome.
  • the difference in the specifications of the radomes in different frequency bands leads to their incompatibility, which not only leads to excessive production costs, such as the need for multiple production lines, multiple molds, etc., but also increases the risk of mis-mixing during production or assembly.
  • the radome is formed into a concave or convex surface shape by a thermoforming process, and the processing cost in this manner is relatively high, which is disadvantageous for the manufacturer to reduce the operating cost.
  • the technical problem to be solved by the present invention is to overcome the above drawbacks, and to provide a wide-band flexible radome for microwave antennas that does not need to be determined according to the working wavelength of the antenna, has light weight, small insertion loss of the antenna, good wave transmission performance, and can satisfy the multi-band universal microwave antenna. .
  • the technical solution adopted by the present invention to solve the above technical problem is: a microwave antenna wide-band flexible radome, which is fixed around a surrounding ring disposed around an antenna and opposite to a reflecting surface of the antenna, wherein the radome is high
  • the outer layer of the molecular polymer and the composite fiber textile structural layer mixed with the shielded absorbing wire are compositely formed, and a tensioning element for connecting the traction mechanism is disposed on a side of the radome facing the reflecting surface of the antenna, and the traction mechanism is connected to the enclosure
  • a traction force capable of deforming the radome into a concave surface is applied to the radome via the tensioning member.
  • the radome is provided with a reinforced connecting layer integrally connected thereto.
  • a pressing ring with an L-shaped cross section is buckled at the upper end of the enclosure, and the periphery of the radome is pressed and fixed on the enclosure.
  • the radome is folded around the upper end of the enclosure, and the peripheral edge of the radome protrudes from the gap between the pressing ring and the enclosure, and is fixed at the protruding portion of the radome for limiting A fixing piece that passes through a gap between the pressing ring and the enclosure.
  • the upper end of the enclosure is provided with a downwardly folded flange, and the compression ring is fixed on the flange by screws or rivets.
  • the traction mechanism is a traction wire passing through a through hole provided in the tensioning member, and two ends of the traction wire are respectively connected to the inner side wall of the enclosure.
  • the tensioning element is a connecting piece fixed at the center of the radome, and the connecting piece is provided with a through hole extending in a diameter direction of the radome.
  • the end of the traction wire is connected to a pre-tightening screw, one end of the pre-tightening screw passes through a connecting hole on a fixing component provided on the inner side wall of the enclosure, and protrudes on the protruding end of the pre-tightening screw
  • a preload spring is disposed between the portion and the fixing member.
  • the end of the traction wire passes through a connecting hole on a fixing component of the inner side wall of the enclosure, the through end thereof is folded back, and is not worn through the metal sleeve and the traction wire. A part of the connection hole is fixedly connected.
  • the end of the traction wire is connected to a fixing screw which passes through a connecting hole on a fixing member of the inner wall of the enclosure and is fixed by a nut.
  • the invention has the beneficial effects that the radome is composed of a polymer polymer outer layer and a composite fiber textile structure layer.
  • the composite fiber textile structural layer is the main structural material in the radome to increase the strength and bear the force. Due to the high strength of the textile fibers, the finished radome also has high strength and good durability.
  • the present invention incorporates a shielded absorbing wire made of a shielded absorbing material in the woven fabric constituting the woven fabric structure layer.
  • the shielded absorbing wire has a certain function of shielding and absorbing electromagnetic waves, and is combined with textile fibers to form a composite fiber textile structural layer. This structure can effectively improve the electrical performance of the radome, reduce the insertion loss of the antenna, and improve its wave transmission performance.
  • the radome of this structure has good wave permeability, and it is not necessary to select the thickness of the radome according to the operating wavelength of the antenna.
  • a uniform thickness of the radome can achieve lower antenna insertion loss in multiple frequency bands, which can meet the needs of multi-band microwave antennas, and achieve versatility of the radome over a wide frequency range, overcoming the tradition.
  • ABS and other material radomes have different disadvantages in different frequency bands.
  • the radome is made of a flexible material that does not require too much thickness to have a higher strength than a rigid material, and thus has a relatively thin thickness and a light weight.
  • the radome of the present invention uses a high molecular polymer as a radome outer layer, and a composite shielding absorbing wire in a composite fiber textile structure layer, which has better electrical properties and transparency than a general flexible radome.
  • the cloth should also be high.
  • the flexible radome of the invention is concavely formed by the traction force of the traction mechanism to reduce the return loss of the electromagnetic wave on the one hand, and the radome can be tightened by the traction force of the traction mechanism on the other hand, and the traction mechanism also plays a fixed role.
  • the fatigue loss caused by the repeated deformation of the radome can be slowed down, and the service life of the radome can be prolonged.
  • the radome has high versatility, has good and stable electrical performance in the full frequency range, and greatly reduces the weight of the antenna and reduces the production cost of the antenna.
  • FIG. 1 is a cross-sectional view of a microwave antenna and a flexible radome of the present invention.
  • FIG. 2 is a schematic view of a radome of the present invention.
  • Figure 3 is a partial cross-sectional view showing the side of the radome of the present invention.
  • Figure 4 is a schematic view showing the manner in which the radome is fixed on the enclosure.
  • Figure 5 is a partial enlarged view of the area A in Figure 1.
  • Figure 6 is a partial enlarged view of the area B of Figure 1.
  • Fig. 7 is a schematic view showing another embodiment of the manner in which the pull wire is fixed.
  • Figure 8 is a partial enlarged view of the area C of Figure 1.
  • FIG. 9 is a schematic illustration of another embodiment of an antenna enclosure.
  • Figure 10 is a graph showing the insertion loss of the radome of the present invention and the ABS radome of the prior art.
  • the microwave antenna wide-band flexible radome of the present invention is an important component for protecting the microwave antenna, and is disposed on the front surface of the antenna, and is fixed around the enclosure 4 disposed around the antenna and opposite to the reflection surface 6 of the antenna.
  • the radome 1 used in the microwave antenna of the present invention is in the form of a cloth-like flexible material, and the radome 1 of the flexible material is spread over the antenna reflecting surface 6 On the opposite side, the radome 1 is stretched around the periphery and is tensioned and fixed on a ring 4 disposed around the reflecting surface of the antenna.
  • the enclosure 4 is used to limit lateral radiation from the antenna, thereby improving the performance of the antenna.
  • the structure and arrangement of the enclosure 4 are substantially the same as in the prior art, and the same portions will not be described in detail.
  • the material of the radome is flexible, it can be deformed into a desired concave shape by an external force such as pulling. Therefore, unlike the rigid radome such as the conventional ABS engineering plastic, it is not necessary to perform thermoforming, and the production of the mold can be omitted, thereby reducing the cost.
  • the radome of the present invention is a flexible multi-layer composite structure mainly composed of a composite fiber textile structure layer and a polymer polymer outer layer attached to the conjugate fiber textile structure layer.
  • the outer layer of the polymer polymer is mainly formed by curing a coating of the polymer material material disposed on the woven fabric structure layer, for example, one of polymer materials such as polyvinyl chloride, polypropylene, and polyamide. Or a mixture of several kinds, using a hot melt, coating, wetting, etc. to form a polymer material coating on the composite fiber textile structural layer, and then curing to form a polymer polymerization on the composite fiber textile structure layer.
  • the outer layer of matter is mainly formed by curing a coating of the polymer material material disposed on the woven fabric structure layer, for example, one of polymer materials such as polyvinyl chloride, polypropylene, and polyamide. Or a mixture of several kinds, using a hot melt, coating, wetting, etc. to form a polymer
  • the material Since the radome requires good wave transmission performance, the material is required to have a low dielectric constant and a tangent loss, and therefore, the specific polymer material can be selected according to the performance parameter. At the same time, we must take into account the mechanical properties of the material. Although the force of the radome is mainly borne by the composite fiber textile structure layer, at the same time, it has excellent electrical and mechanical properties and can improve the performance and service life of the antenna.
  • the composite fiber textile structural layer is a main structural material in the radome that increases mechanical strength and bears a force, and is mainly made of textile fibers (such as polyvinyl chloride fibers) through a textile process. Since the strength of textile fibers such as polyvinyl chloride fibers is generally high, the resulting radome also has high strength and tensile properties, so that it can adapt to the influence of the external environment and has good durability.
  • the composite fiber textile structural layer of the present invention is different from the general textile fiber cloth.
  • the shielded absorber wave made of a shielded absorbing material is mixed.
  • the shielded absorbing wire has the function of shielding and absorbing electromagnetic waves, and is structurally combined with textile fibers such as polyvinyl chloride fibers, and the composite may be interwoven or entangled between different fibers, or the shielded absorbing wire is Doping in the voids of textile textile structures.
  • the composite fiber textile structural layer is thus formed, which can effectively improve the electrical properties of the composite fiber textile structural layer and the radome, thereby obtaining better wave transmission performance than conventional textile fiber cloth.
  • the microwave antenna can obtain lower insertion loss and better wave transmission performance.
  • the shielded absorbing wire is made of a shielding absorbing material in the prior art, such as carbon black fiber, textile fiber coated with metal micropowder, silicon carbide fiber, etc., due to more materials, the article is not enumerated one by one. .
  • the fiber material of the shielded absorbing wire does not need to be too long in length, and can be compounded with the textile fiber.
  • the specific preparation method of the fiber material for shielding the absorbing wire and the specific spinning method of the woven fiber structure layer can be referred to the prior art, and will not be described in detail herein.
  • the polymer polymer outer layer and the composite fiber textile structure layer of the radome of the present invention may further comprise some auxiliary components added as needed in a specific production process, such as some components for bonding, or improving ultraviolet protection performance. Ingredients, etc. When these components are added according to the production needs, the auxiliary component should also be regarded as a part of the polymer outer layer or the composite fiber textile structural layer.
  • the thickness of the radome fabricated by the radome is not determined according to the working wavelength of the antenna. It has good versatility in different frequency bands. Therefore, it is possible to overcome the defects such as high cost of the conventional radome, non-universal, etc., and high risk of mis-mixing.
  • the thickness of the composite flexible radome can be relatively thin, and the overall thickness can be set to a thickness of 0.8 mm or less. Therefore, the radome is very light in weight, which can reduce the overall weight of the antenna and meet the customer's demand for lightweight.
  • the flexible radome of the invention has better differential loss in the frequency band of 6G-26G after shielding the absorbing wire to improve the electrical performance, can meet the wide-band versatility, and has the characteristics of light weight and low price.
  • the radome of the present invention is flexible, it can be formed into a desired shape by assembly, and thus it is not required to be manufactured by thermoforming as a rigid radome, and the production and processing cost can be reduced.
  • the radome 1 is mounted on the enclosure 4 around the reflecting surface of the antenna, it is formed into a concave surface by pulling. Specifically, the following structural manner can be adopted.
  • the invention is provided with one or more tensioning elements 2 on one side of the radome 1 facing the antenna reflecting surface 6, the tensioning element 2 being fixedly connected to the radome 1 and integrated with the antenna
  • the cover 1 is connected to the traction mechanism 11 between the reflecting surfaces 6.
  • the traction mechanism 11 pulls the radome 1 on the one hand and the inner wall of the enclosure 4 on the other hand.
  • the traction mechanism 11 applies a traction force to the radome 1 via the tensioning element 2, and the radome 1 is deformed into a concave surface by the traction force, thereby reducing the return loss of the electromagnetic wave.
  • the traction mechanism 11 can adopt a traction wire, a tie rod, etc., and which form can be determined according to actual needs.
  • a traction mechanism in the form of a traction wire is used, which has a good assembly flexibility and a simple and lightweight structure.
  • the pull wire is connected to the tensioning element 2 of the radome 1 and the radome 1 is recessed to the desired extent when pulled down, and the pull wire is fixed to the inner side wall of the enclosure 4.
  • a plurality of traction wires may be symmetrically disposed between the radome 1 and the reflecting surface 6 as needed, and the plurality of pulling wires are respectively connected to the tensioning members 2 on the radome 1. It may be connected to the same tensioning element 2, or it may be connected to a different tensioning element 2, respectively.
  • This embodiment preferably uses a pull wire as the traction mechanism 11 , and the pull wire passes through the through hole provided on the tensioning member 2, and the two ends of the pull wire are respectively turned to two The side extends obliquely downward, and after the radome 1 is pulled and recessed to a desired extent, the two ends of the traction wire are respectively connected to the inner side wall of the enclosure 4.
  • the sliding of the traction wire in the perforation automatically adjusts both sides of the perforation when the radome is pulled down via both ends of the traction wire
  • the length of the traction wire is such that the length of the traction wire on both sides of the tensioning element 2 is adapted to the distance of the tensioning element 2 to the fixing point of the traction wire at the inner side wall of the enclosure 4, so that the traction wire pair tensioning elements 2 on both sides of the perforation
  • the traction applied by the radome 1 is exactly the same, thereby keeping the radome under stress.
  • Figures 1, 2 and 8 show an embodiment of a tensioning element 2 suitable for use in a traction wire.
  • the main body of the tensioning member 2 is a connecting piece fixed to the center of the radome 1.
  • the connecting piece can be tiled and fixedly attached to the radome by gluing, heat sealing, sewing or the like.
  • the connecting piece has an elongated protruding portion, and the protruding portion is provided with a through hole 2-1 extending through the longitudinal direction thereof, and the through hole 2-1 extends in the diameter direction of the radome to have a relatively long axial direction. length.
  • the traction wires are connected from the perforations 2-1 through the rear ends to the two opposite fixed portions on the inner side wall of the enclosure 4. Since the pull wire has a longer length in the perforation 2-1, the pull wire has a larger range of force when pulling down the tensioning element 2 and the radome 1 against the tensioning element 2 The force applied to the radome 1 is more uniform.
  • the tensioning element 2 can also be in the form of a connecting tab, a hook or the like, as desired.
  • the present invention deforms the inwardly concave surface by pulling the radome 1 downward, and reduces the return loss of the electromagnetic wave by the inclined surface formed by the recess.
  • the fixing portion of the peripheral edge of the radome 1 on the enclosure 4 also needs to bear the force applied by the traction mechanism 11.
  • the peripheral edge of the radome 1 needs to be firm and stable. It is fixed to the enclosure 4 around the antenna reflecting surface 6 so that it does not slip under the pulling force of the traction mechanism 11.
  • a reinforcing connecting layer 1 connected to the outer periphery of the radome 1 may be disposed.
  • the reinforcing connecting layer 1-1 may be a folded portion formed by folding the peripheral edge of the radome toward the center, or may be laminated on the periphery of the radome 1 to form a double layer structure.
  • the connection between the periphery of the enclosure 4 and the upper end of the enclosure 4 is fixed by the attachment of the reinforcing connection layer 1-1 to increase the reliability of the connection.
  • the fixing around the radome 1 requires the use of an L-shaped compression ring 3, the compression ring 3
  • the size is adapted to the size of the upper end of the cylinder formed by the enclosure 4.
  • the compression ring 3 is inverted on the upper end of the enclosure 4, wherein one of the L-shaped sections of the compression ring 3 is flush with the upper end surface of the enclosure 4 and the other side is adjacent to the outer side of the enclosure 4.
  • the compression ring 3 After extending the peripheral edge of the radome 1 to the upper end of the enclosure 4, the compression ring 3 is assembled in position, and the compression ring 3 is fixedly connected to the enclosure 4 by screws or rivets 4-2, using the compression ring 3
  • the periphery of the radome which is previously spread to the upper end of the enclosure 4 is pressed and fixed on the enclosure 4 to achieve the spreading and fixing of the radome.
  • the fixing structure is simpler, requires fewer components, requires less cost, and the pressing is performed.
  • the assembly and operation of the ring 3 is more convenient, which reduces the labor cost of the antenna installation and improves the assembly efficiency.
  • the overall size of the radome 1 is larger than the maximum size of the upper end of the cylinder formed by the enclosure 4, so that the peripheral edge of the radome 1 spreads to the upper end of the enclosure 4 and can be further extended. It is folded down and covered from the outside at the upper end of the enclosure 4. The folded edge of the radome 1 extends downwardly against the outside of the enclosure 4 and extends from the gap between the compression ring 3 and the outer side of the enclosure 4.
  • a fixing piece 7 is provided on the protruding portion of the radome 1, and the fixing piece 7 is integrally fixed to the periphery of the radome 1 by means of a rivet 7-1 or the like. The fixing piece 7 is larger in size than the gap between the pressing ring 3 and the surrounding ring 4. After assembly, the compression ring 3 can catch the fixing piece 7 and restrict the peripheral edge of the radome 1 from passing through the slit.
  • the fixing pieces 7 are evenly distributed on the circumferential edge of the radome 1, and are integrally fixed to the radome 1 by means of rivets 7-1 and the like.
  • the radome 1 After the radome 1 is spread, its periphery extends as shown in FIG. 4 to the outer side of the upper end of the enclosure 4 and extends downward.
  • the pressing ring 3 is buckled at the upper end of the enclosure 4, and the fixing of the radome 1 is fixed by the pressing ring 3.
  • the sheet 7 is pushed downwards, and on the one hand, the fixing piece can be pushed by the pressing ring 3 during assembly to facilitate spreading the radome, and on the other hand, the fixing piece 7 can be restrained by the pressing ring 3 to prevent the radome.
  • the radial slip under the action of an external force such as a pulling action of the traction mechanism 11 or a wind blow increases the firmness of the periphery of the radome.
  • a preferred embodiment of the antenna enclosure 4 is also shown in the embodiment shown in FIG. 4, in which the upper end of the enclosure 4 is provided with a downwardly folded flange 4-1.
  • the upper end surface of the flange 4-1 is a flat surface for connecting the fixed radome 1 and the pressing ring 3.
  • the flange 4-1 increases the size of the upper end surface of the enclosure 4, and increases the contact surface between the radome 1 and the enclosure 4, that is, the area of the clamping surface, which is more advantageous for clamping and fixing the periphery of the radome 1 Between the compression ring 3 and the enclosure 4.
  • the area of the upper end surface of the enclosure 4 which is increased by the above-mentioned flange 4-1 also facilitates the connection and fixing of the compression ring 3.
  • the compression ring 3 can be screwed or pulled by the screw 4-2.
  • the radome 1 and the flange 4-1 of the enclosure 4 are pre-tensioned together.
  • FIG. 5 shows several embodiments of the traction mechanism 11 (e.g., the traction line) attached to the inner side wall of the enclosure 4, respectively.
  • the traction mechanism 11 e.g., the traction line
  • the traction mechanism 11 is in the form of a pull wire that is coupled to the inner side wall of the enclosure 4 by a pre-tightening screw 10.
  • the specific structure is that the end of the pulling wire passes through the hole of one end of the pre-tightening screw 10 and is fixed.
  • One end of the pre-tightening screw 10 passes through a connecting hole (not shown) provided on a fixing member 5 on the inner side wall of the enclosure 4, and the pre-tightening screw 10 is movable in the connecting hole via a pre-tensioning spring 12 Pre-tightening.
  • the fixing member 5 is formed by an angle steel which is fixed to the inner side wall of the enclosure 4 by screws or rivets 5-1.
  • One of the two mutually perpendicular plates of the angle is attached to the inner side wall of the enclosure 4 and is fixed by screws or rivets 5-1.
  • the other plate surface of the angle steel is perpendicular to the inner side wall of the enclosure 4, and a connection hole is formed in the plate surface.
  • the upper end of the pre-tightening screw 10 is connected to the pulling wire, and the lower end thereof passes through the connecting hole and is movable up and down in the connecting hole.
  • a pretensioning spring 12 is sleeved on a portion of the pretensioning screw 10 that passes through the connecting hole.
  • a nut is screwed onto the through end of the pretensioning screw 10 through the connecting hole, and the nut forms a projection 10-1 fixed to the pretensioning screw 10.
  • the projection 10-1 can also be formed in other ways, such as by welding a protruding member on the pretensioning screw 10.
  • the pretension spring 12 is a compression spring sandwiched between the projection 10-1 of the pretensioning screw 10 and the fixing member 5 on the inner side wall of the enclosure 4. Since the fixing member 5 is fixed to the inner side wall of the enclosure 4, the elastic force of the pretension spring 12 is applied downwardly to the pretensioning screw 10 via the projection 10-1, and thus to the traction wire fixed to the upper end of the pretensioning screw 10. A downwardly elastic preload is applied to the radome pulled by the pull wire.
  • This embodiment is an elastic pre-tensioned connection form. By the elastic pre-tensioning force applied to the traction wire by the pre-tensioning spring 12 and the pre-tightening screw 10, the radome 1 can be kept stretched and spread without being used.
  • the time is prolonged and becomes slack. Therefore, it is possible to prevent an increase in the vibration amplitude due to the wind force due to the slack of the radome 1, thereby reducing the fatigue loss caused by the repeated deformation of the radome, and prolonging the service life of the radome.
  • the traction mechanism 11 in the form of a traction wire used in the above embodiment of the present invention is a through hole passing through the tensioning member 2 and movable in the perforation, the traction wires on both sides of the perforation are equally stressed, and elasticity is applied on one side.
  • the preload can pre-tension the entire traction line.
  • This elastic pre-tensioned connection can be used only for the connection of one end of the pull wire as shown in Figure 1, while the other end of the pull wire is in the form of other fixed connections. It is also possible to use a pre-tightening connection of the pretensioning screw 10 and the pretensioning spring 12 at both ends of the traction line.
  • the embodiment shown in Figure 6 is a fixed connection of the pull wire.
  • the inner side wall of the enclosure 4 is also provided with a fixing member 5 which can be fixed to the inside of the enclosure 4 by means of screws or rivets 5-1 as in the embodiment shown in FIG.
  • the angle steel on the wall is formed.
  • a connecting hole is also formed in the surface of the angle perpendicular to the inner side wall of the enclosure 4.
  • the connecting hole may be a threaded hole or a light hole.
  • the pull wire is connected to a set screw 14, as shown, the end of the pull wire passes through the hole in the upper end of the set screw 14 and is fixed.
  • the lower end of the fixing screw 14 passes through the connecting hole on the fixing member 5 and is directly fixed by a nut.
  • this embodiment does not use a pre-tensioning spring, but is directly fixed by a nut. Therefore, it is a rigidly fixed connection form, which does not function as an elastic pre-tightening connection.
  • the fixed connection form described in this embodiment can be used in the form of an elastic connection of the pretensioning screw shown in FIG.
  • the other end adopts the fixed connection manner shown in this embodiment.
  • the embodiment shown in Figure 7 shows another form of fixed connection of the pull wire.
  • This embodiment also needs to provide a fixing member 5 on the inner side wall of the enclosure 4.
  • the fixing member 5 can be in the form of the angle steel shown in the above embodiment of FIG. 5 or FIG. 6, and the angle steel is perpendicular to the panel surface of the inner side wall of the enclosure 4.
  • a connection hole is provided in the upper opening.
  • the connecting hole is a threading hole which can be smaller than the connecting hole in the embodiment shown in Fig. 5 or Fig. 6.
  • the end of the pull wire passes through the connection hole in the fixing member 5, and the portion of the pull wire that passes through the connection hole (i.e., the piercing end of the pull wire) is folded back.
  • a metal sleeve 13 is placed on the end of the pull-back folded end of the pull line and the pull line close to the wear-out end, and then an external force is applied.
  • the metal sleeve 13 is plastically deformed and pressed, so that the end portion of the pull line folded back is fixedly connected to the portion of the pull line through which the pull line does not pass through the metal sleeve 13 to achieve the function of fixing the pull line.
  • connection method described in this embodiment can be used for the connection of the two ends of the traction wire, or only for connecting one end of the traction wire, and the other end adopts the connection form shown in FIG. 5 or FIG.
  • Fig. 9 shows another embodiment of the microwave antenna, which is different from the form of the straight cylindrical shunt 4 shown in Fig. 1.
  • the enclosure 4 is inclined and the heights of the surroundings can be inconsistent.
  • the radome 1 is arranged in an inclined shape.
  • the fixed connection form of the radome 1 shown in the above embodiments, the form in which the pull wire is pulled, and the manner in which the ends of the pull wire are connected are also applicable to the oblique fence of this embodiment. Moreover, in the above manner, it is also possible to maintain a good and stable spreading and fixing of the radome.
  • Figure 10 is a graph showing the insertion loss of a microwave antenna as a function of frequency using the radome of the present invention.
  • the flexible radome has a low insertion loss in the frequency range of 6G-26G, which is not more than 0.3dB, and the insertion loss is not affected by the frequency, which can meet the versatility of the wide-band microwave antenna.
  • the radome of the present invention is composed of a polymer polymer outer layer and a composite fiber textile structure layer, and is combined with a shielded absorbing wire in the conjugate fiber textile structure layer, and the composite structure can effectively improve the electrical performance of the radome.
  • the antenna insertion loss of the radome of the present invention is maintained at a relatively stable low value over a wide frequency range. Compared with the conventional radome, the antenna insertion loss is not greatly increased due to the frequency band variation, and thus has better versatility in a relatively wide frequency range.
  • the radome of this structure has good wave permeability, and it is not necessary to select the thickness of the radome according to the operating wavelength of the antenna.
  • a uniform thickness of the radome can achieve lower antenna insertion loss in multiple frequency bands, which can meet the needs of multi-band microwave antennas, and achieve versatility of the radome over a wide frequency range, overcoming the tradition.
  • ABS and other material radomes have different disadvantages in different frequency bands.
  • the radome is made of a flexible material that does not require too much thickness to have a higher strength than a rigid material, and thus has a relatively thin thickness and a light weight.
  • the radome of the present invention uses a high molecular polymer as a radome outer layer, and a composite shielding absorbing wire in a composite fiber textile structure layer, which has better electrical properties and transparency than a general flexible radome.
  • the cloth should also be high.
  • the flexible radome of the invention is concavely formed by the traction force of the traction mechanism to reduce the return loss of the electromagnetic wave on the one hand, and the radome can be tightened by the traction force of the traction mechanism on the other hand, and the traction mechanism also plays a fixed role.
  • the fatigue loss caused by the repeated deformation of the radome can be slowed down, and the service life of the radome can be prolonged.
  • the radome has high versatility, has good and stable electrical performance in the full frequency range, and greatly reduces the weight of the antenna and reduces the production cost of the antenna.

Landscapes

  • Details Of Aerials (AREA)

Abstract

L'invention concerne un radôme souple à large bande pour une antenne à micro-ondes. La périphérie du radôme est fixée sur une enceinte disposée autour de l'antenne et opposée à une surface réfléchissante de l'antenne. Le radôme est formé par combinaison d'une couche de polymère externe et d'une couche structurelle textile de fibre composite ayant un blindage et des fils d'absorption d'onde mélangés à l'intérieur de celle-ci, et un élément de tension destiné à être relié à un mécanisme de traction est disposé sur un côté du radôme faisant face à la surface réfléchissante de l'antenne. Le mécanisme de traction est relié à la paroi interne de l'enceinte, et une force de traction apte à déformer le radôme en une surface concave agit sur le radôme par l'intermédiaire de l'élément de tension. Le radôme d'une telle structure présente une bonne perméabilité aux ondes, et il n'est pas nécessaire de sélectionner une épaisseur de radôme en fonction de la longueur d'onde de fonctionnement de l'antenne. Un radôme ayant une épaisseur uniforme peut obtenir une perte d'insertion d'antenne inférieure dans une pluralité de bandes de fréquence et peut satisfaire aux besoins d'antennes micro-ondes multibandes. Le radôme permet d'obtenir une polyvalence sur une large plage de fréquences, ce qui permet de surmonter l'inconvénient des radômes classiques fabriqués à partir de matériaux tels que l'ABS qui présentent des différences de performance dans différentes bandes de fréquences.
PCT/CN2018/081240 2018-02-13 2018-03-30 Radôme souple à large bande pour antenne à micro-ondes Ceased WO2019157770A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP18906409.0A EP3754785B1 (fr) 2018-02-13 2018-03-30 Radôme souple à large bande pour antenne à micro-ondes

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201810149166.8A CN108461916B (zh) 2018-02-13 2018-02-13 一种微波天线宽频柔性天线罩
CN201810149166.8 2018-02-13

Publications (1)

Publication Number Publication Date
WO2019157770A1 true WO2019157770A1 (fr) 2019-08-22

Family

ID=63217025

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2018/081240 Ceased WO2019157770A1 (fr) 2018-02-13 2018-03-30 Radôme souple à large bande pour antenne à micro-ondes

Country Status (3)

Country Link
EP (1) EP3754785B1 (fr)
CN (1) CN108461916B (fr)
WO (1) WO2019157770A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115158980A (zh) * 2022-07-04 2022-10-11 中山市诚力通通信科技有限公司 天线罩牵引机
CN115548669A (zh) * 2022-09-16 2022-12-30 刘永梅 一种移动基站用微波天线的自调节罩
CN116315573A (zh) * 2023-03-10 2023-06-23 中国人民解放军空军工程大学 一种偏馈式微波天线

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108963417A (zh) * 2018-08-30 2018-12-07 广东通宇通讯股份有限公司 一种易于实现不同频段切换的微波天线
CN109103594B (zh) * 2018-08-30 2024-06-04 广东通宇通讯股份有限公司 一种用于微波天线的天线罩
CN109188561B (zh) * 2018-09-19 2023-10-20 北京洛达世安电子设备有限公司 微波测试工具及其测试方法
EP3834252A4 (fr) * 2018-10-12 2022-05-25 CommScope Technologies LLC Structures de radôme souple
CN109400194B (zh) * 2018-10-30 2021-07-09 山东工业陶瓷研究设计院有限公司 W波段用纤维增强陶瓷基复合材料天线罩及制备方法
CN111987450B (zh) * 2020-07-31 2021-05-28 中国航空工业集团公司济南特种结构研究所 一种防护功能天线结构
CN113964516B (zh) * 2021-09-27 2022-12-09 浙江大学 一种基于可调天线罩的二维波束扫描天线

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3388401A (en) * 1965-06-30 1968-06-11 Andrew Antenna Company Ltd Parabolic antenna with low-loss flexible radome
CN103442882A (zh) * 2011-03-22 2013-12-11 帝斯曼知识产权资产管理有限公司 充气雷达罩
CN104364967A (zh) * 2012-03-27 2015-02-18 因度福莱克斯公司 用于张紧天线罩织物的张紧装置
WO2017103008A1 (fr) * 2015-12-18 2017-06-22 Dsm Ip Assets B.V. Paroi de radôme à feuille polymère multicouche
EP3220548A1 (fr) * 2016-03-18 2017-09-20 Huawei Technologies Co., Ltd. Boîtier d'antenne avec élément de tension

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7560400B2 (en) * 2003-07-16 2009-07-14 Raytheon Company Radome with polyester-polyarylate fibers and a method of making same
FR2894391B1 (fr) * 2005-12-06 2008-01-04 Alcatel Sa Antenne de radiocommunication munie d'un radome et procede d'assemblage d'une telle antenne de radiocommunication munie d'un radome
CN101958461B (zh) * 2010-09-07 2013-11-20 京信通信系统（中国）有限公司 微波天线及其外罩
US9583822B2 (en) * 2013-10-30 2017-02-28 Commscope Technologies Llc Broad band radome for microwave antenna
ES2868348T3 (es) * 2014-10-14 2021-10-21 Ubiquiti Inc Cubiertas de aislamiento de señal y reflectores para antena
CN205790373U (zh) * 2016-06-27 2016-12-07 武汉凡谷电子技术股份有限公司 一种微波天线
CN206480762U (zh) * 2016-12-27 2017-09-08 广东通宇通讯股份有限公司 天线系统及其天线罩
CN207925674U (zh) * 2018-02-13 2018-09-28 广东通宇通讯股份有限公司 一种微波天线宽频柔性天线罩

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3388401A (en) * 1965-06-30 1968-06-11 Andrew Antenna Company Ltd Parabolic antenna with low-loss flexible radome
CN103442882A (zh) * 2011-03-22 2013-12-11 帝斯曼知识产权资产管理有限公司 充气雷达罩
CN104364967A (zh) * 2012-03-27 2015-02-18 因度福莱克斯公司 用于张紧天线罩织物的张紧装置
WO2017103008A1 (fr) * 2015-12-18 2017-06-22 Dsm Ip Assets B.V. Paroi de radôme à feuille polymère multicouche
EP3220548A1 (fr) * 2016-03-18 2017-09-20 Huawei Technologies Co., Ltd. Boîtier d'antenne avec élément de tension

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115158980A (zh) * 2022-07-04 2022-10-11 中山市诚力通通信科技有限公司 天线罩牵引机
CN115548669A (zh) * 2022-09-16 2022-12-30 刘永梅 一种移动基站用微波天线的自调节罩
CN116315573A (zh) * 2023-03-10 2023-06-23 中国人民解放军空军工程大学 一种偏馈式微波天线

Also Published As

Publication number Publication date
EP3754785A1 (fr) 2020-12-23
EP3754785C0 (fr) 2023-07-26
CN108461916A (zh) 2018-08-28
EP3754785B1 (fr) 2023-07-26
EP3754785A4 (fr) 2021-10-27
CN108461916B (zh) 2020-04-17

Similar Documents

Publication Publication Date Title
WO2019157770A1 (fr) Radôme souple à large bande pour antenne à micro-ondes
CN207925674U (zh) 一种微波天线宽频柔性天线罩
US6198445B1 (en) Conformal load bearing antenna structure
US20070229379A1 (en) Digital UHF/VHF antenna
WO1993023893A1 (fr) Structure electromagnetique absorbant l'energie
JP4620664B2 (ja) ポリエステル‐ポリアリレート繊維を備えたレドームおよびその製造方法
CN1979954B (zh) 配备有天线罩的无线电通信天线及其组装方法
CN109353861A (zh) 一种特氟龙网格带的滚筒式卷收装置
JPS6215768B2 (fr)
JP5263957B2 (ja) レドームおよびその製造方法
CA2532274A1 (fr) Radome rigide a fibres de polyester-polyarylate et procede d'elaboration
CN207925673U (zh) 一种微波天线罩布固定结构
CN212462024U (zh) 一种微波天线宽频柔性天线罩
KR910008947B1 (ko) 안테나
US8876198B2 (en) Device and method for fastening, clamping, or adjusting two components to one another
CA2604405A1 (fr) Antenne numerique uhf-vhf
CN109103594A (zh) 一种用于微波天线的天线罩
CN216120749U (zh) 一种定向壁挂天线
CN208674368U (zh) 一种用于微波天线的天线罩
JP2003142918A (ja) 開口面アンテナ
CN211222361U (zh) 一种复合纤维带
CN215645033U (zh) 一种三频段共体天线
CN207705386U (zh) 一种天线罩
CN217731353U (zh) 一种用于低频共振换能器装置
CN108134213B (zh) 宽频段复合吸波器及其应用

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18906409

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

ENP Entry into the national phase

Ref document number: 2018906409

Country of ref document: EP

Effective date: 20200914